| Hyrtl's anastomosis | A communicating loop between the right and left hypoglossal nerves, lying between the geniohyoid and genioglossus muscles or in the substance of the geniohyoid; it is found in about one in ten persons. Synonym: Hyrtl's anastomosis. (05 Mar 2000) |
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| Hyrtl, Joseph | <person> Austrian anatomist, 1810-1894. See: Hyrtl's anastomosis, Hyrtl's foramen, Hyrtl's loop, Hyrtl's epitympanic recess, Hyrtl's sphincter. (05 Mar 2000) |
| Hyrtl's epitympanic recess | The upper portion of the tympanic cavity above the tympanic membrane; it contains the head of the malleus and the body of the incus. Synonym: recessus epitympanicus, attic, epitympanic space, epitympanum, Hyrtl's epitympanic recess, tympanic attic. (05 Mar 2000) |
| Hyrtl's foramen | An occasional foramen in the sphenoid bone through which passes the motor portion of the trigeminal nerve; it is formed by ossification of a ligament below and lateral to the foramen ovale. Synonym: Hyrtl's foramen. (05 Mar 2000) |
| Hyrtl's loop | A communicating loop between the right and left hypoglossal nerves, lying between the geniohyoid and genioglossus muscles or in the substance of the geniohyoid; it is found in about one in ten persons. Synonym: Hyrtl's anastomosis. (05 Mar 2000) |
| Hyrtl's sphincter | A band, generally incomplete, of circular muscular fibres in the rectum about 10 cm above the anus (upper rectal ampulla). See: Nelaton's sphincter. (05 Mar 2000) |
| anastomosis | <surgery> An opening created by surgical, traumatic or pathological means between two normally separate spaces or organs. (04 May 1997) |
| anastomosis arteriovenosa | <anatomy> A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula. (12 Dec 1998) |
| anastomosis, roux-en-y | A y-shaped surgical anastomosis of any part of the digestive system which includes the small intestine as the eventual drainage site. (12 Dec 1998) |
| anastomosis, surgical | Surgical union or shunt between ducts, tubes or vessels. It may be end-to-end, end-to-side, side-to-end, or side-to-side. (12 Dec 1998) |
| aneurysm by anastomosis | A mass of dilated anastomosing vessels that produce a pulsating tumour usually in a superficial position. (05 Mar 2000) |
| arteriolovenular anastomosis | <anatomy> A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula. (12 Dec 1998) |
| arteriovenous anastomosis | <anatomy> A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula. (12 Dec 1998) |
| A-V anastomosis | <anatomy> A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula. (12 Dec 1998) |
| Beclard's anastomosis | An anastomosis between the right and the left end-branch of the deep lingual artery. Synonym: arcus raninus. (05 Mar 2000) |